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Fan shroud? That can make all the difference. I cooled my 440 with a 22" 3 row, shroud, and solid fan.



Yep i have a nice factory shroud and the fan is about 2 inches away from it.



What is the amound the fan is sunk into the fan shroud opening? Like 50/50 in and out. Or something else?

What is the minimum gap between the fan tip and shroud edge? Probably not 100% perfect consistant gap all the way around and that's fine.